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Test your basic knowledge |
Dairy Cattle And Reproduction
Start Test
Study First
Subjects
:
industries
,
dairy
Instructions:
Answer 50 questions in 15 minutes.
If you are not ready to take this test, you can
study here
.
Match each statement with the correct term.
Don't refresh. All questions and answers are randomly picked and ordered every time you load a test.
This is a study tool. The 3 wrong answers for each question are randomly chosen from answers to other questions. So, you might find at times the answers obvious, but you will see it re-enforces your understanding as you take the test each time.
1. Days which have increasing daylight hours
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2. 2 month growth cycle. stored in the epididymis of the bull
butterfat
4 major reasons for culling dairy cows
Sperm growth rate
rectal palpation (BSE)
3. Not under a timeline - cow can not be sold as steak
sperm cell
Grading choice
cryptorchid
sow ovulation
4. 1. to eliminate breeding the females at an early age - 2. makes animals less lean and provides a better cut for the market
sigmoid flexure
reasons for castration
monorchid
Parturition
5. 1. reproduction - 2. mastitis/udder problems - 3. low milk production - 4. soundness/poor feet and legs (living on concrete)
dry-off time in dairy cattle
retractor muscles
4 major reasons for culling dairy cows
oviducts
6. Largest dairy cow - largest udder - highly vascular - eat 40-50% dry matter (eat alot) - most total butterfat
effects of estrogen
Holstein Cow
spermatogenesis
sperm cell
7. 30 hours after estrus begins
cow ovulation
Size of cow in relation to the amount of milk produced
oviducts
you want as much sperm as possible to come in contact with the egg before ovulation. the main idea is to have the sperm already in the oviduct when the egg passes through
8. Front feet and head first. (except for hogs and dogs)
normal presentation of the fetus
Hard
growth lost from castration methods (knife & band)
rectal palpation (BSE)
9. Cleans and lubricates the urethra. secretion is thick - viscous - and very slippery.
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10. Completes uterine growth initiated by estrogen and prepares the uterus for nourishment of developing embryo if pregnancy occurs - supports pregnancy by maintaining quiescent state of reproductive tract and suppresses mating behavior - prevents ovulat
feeding a high producing dairy cow
sow ovulation
monestrous
functions of progestrone
11. Look for infection - split - and rupture of the penis
penis and prepuce observation (BSE)
mare ovulation
Sperm survival specs
mare's estrous cycle
12. Urinary calculi.
kidney stones also called ________ ___________ can develop in the sigmoid flexure
epididymis: definition - 3 parts - 4 functions
sow ovulation
cow estrus
13. (from Jersey Islands in Great Britain) Smallest cow - least milk - highest butterfat %
Holstein Cow
Jersey Cow
ewe estrus cycle
monestrous
14. 336 days
mare gestation
Size of cow in relation to the amount of milk produced
Hard
functions of progestrone
15. When she is pregnant in her last trimester because she needs the energy to carry around and deliver the calf. and when the calf is born because the cow needs the fat to be deposit it into her milk for the calf's energy stores.
ewe estrus
1. more cost effective - 2. powdered milk is in excess production
why does the cow need fat deposits during pregnancy?
Grading choice
16. 2 month growth cycle. stored in the epididymis of the bull
Grading choice
Where livelihood is in agriculture
testosterone
Sperm growth rate
17. 1-3 days
oviducts
mare gestation
sow estrus
effects of BST
18. Examine accessory glands - also to know how big the pelvic opening is->heritable->relates to how much dystocia that bull's daughter has
feeding a high producing dairy cow
vulva
seasonally polyestrous
rectal palpation (BSE)
19. 336 days
oviducts
mare gestation
Jersey Cow
sigmoid flexure
20. Animal which has been castrated after puberty
stag
cow estrus
cow ovulation
femininity of a heifer
21. Way to know everything is alright with the breeding male
Reasons for gestation length being affected
6-8 weeks
purpose of Breeding Soundness Exam (BSE) for males
organs used in spermatogenesis
22. 45-60 days after breeding; re-breed as required
dairy cattle pregnancy check
hypothalamus and pituitary gland
visual evaluation (BSE)
penis and prepuce observation (BSE)
23. % of fat in milk. makes cheeses and ice cream. regulates cost of milk
colostrum
growth lost from castration methods (knife & band)
butterfat
accessory sex glands
24. 14-19 (17) days
elastrator
vagina
ewe estrus cycle
libido test (BSE)
25. 265-285 days
cow estrus
purpose of Breeding Soundness Exam (BSE) for males
femininity of a heifer
Dairy Cattle Gestation
26. (LH) stimulates the Leydig cells to produce testosterone
Lutinizing Hormone in males
cow ovulation
libido test (BSE)
ewe's estrous cycle
27. 1. to eliminate breeding the females at an early age - 2. makes animals less lean and provides a better cut for the market
visual evaluation (BSE)
Sperm survival specs
reasons for castration
visual evaluation (BSE)
28. Largest dairy cow - largest udder - highly vascular - eat 40-50% dry matter (eat alot) - most total butterfat
mare's estrous cycle
ewe estrus
cryptorchid
Holstein Cow
29. Scar tissue plugs up chambers of udder
reasons for castration
mastitis
Dairy Cattle milking schedule
scrotal circumference (BSE)
30. 114 days
rectal palpation (BSE)
vagina
pelvis
sow gestation
31. Cycle that lasts weeks (ovulation->hormone cycles->ovulation)
cowper's gland
estrous
sow estrus cycle
estrus
32. Milk made by mother which includes antibodies for the calf. MUST be given to the calf within the first 24 hrs of life. also provides calf with energy stores. effectiveness lasts from 4-8 months of age.
testosterone
colostrum
penis sizes vs delivering methods
libido test (BSE)
33. BST given to dairy cattle makes the mammary gland more persistent - helps produce more milk. good as Long-term because it does not cause cow to bulk up - provides more milk/cow Which means less cows needed - less cows need to be given feed - lower co
effects of BST
seasonally polyestrous
monorchid
colostrum
34. 16-20 hours
spermatogenesis
urethra
cow estrus
age and castration
35. 1. bring in new genes - 2. replace males with leg problems (difficulty breeding) Note: culling has a much greater emphasis in the dairy industry vs the beef industry.
Holstein Cow
growth lost from castration methods (knife & band)
Culls bulls earlier (2 reasons)
normal presentation of the fetus
36. (male) definition: duct located outside of the testes. 3 parts: head - body - tail. 4 Functions:concentrate sperm - store sperm - transport sperm - site of sperm maturation. entire process takes ~40-60 days
Culls bulls earlier (2 reasons)
epididymis: definition - 3 parts - 4 functions
libido test (BSE)
urethra
37. Why does estrus happen before ovulation?
hypothalamus and pituitary gland
you want as much sperm as possible to come in contact with the egg before ovulation. the main idea is to have the sperm already in the oviduct when the egg passes through
age and castration
Culls bulls earlier (2 reasons)
38. Indicator of sperm production. the bigger the scrotal circumference the bigger volume of sperm because more seminal vesicles available to produce the sperm
Mares
scrotal circumference (BSE)
spermatogenesis
functions of progestrone
39. Days which have decreasing daylight hours
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40. Milk is 15% ________ and 85% __________.
dry matter and water
semen evaluation (BSE)
urethra
cryptorchid
41. Cycle that lasts weeks (ovulation->hormone cycles->ovulation)
butterfat
mare gestation
estrous
feeding a high producing dairy cow
42. What helps regulate spermatogenesis?
Bull's fibro-elastic penis
vulva
testosterone
age and castration
43. (male) pushes the testes outward toward the legs for a cool-down off of the body
vulva
cremaster muscle
femininity of a heifer
uterus
44. So when offspring are born - there is more food to be found for energy stores and fat deposits IN THE SPRING
cow estrus
functions of progestrone
reason for seasonal breeding periods
cryptorchid
45. 19-23 (21) days
growth lost from castration methods (knife & band)
Where livelihood is in agriculture
sow estrus cycle
burdizzo
46. What about the sperm for a bull which has been castrated but still has testicles?
Bull's fibro-elastic penis
4 major reasons for culling dairy cows
Avg. bull specs
Testicles will produce testosterone but not sperm. Bull will attempt to mate - but will be sterile
47. FEED
eminal vesicles
#1 cost in production
Testicles will produce testosterone but not sperm. Bull will attempt to mate - but will be sterile
burdizzo
48. Provide nourishment for the developing sperm
Sperm growth rate
Sperm growth rate
sertoli cells
hypothalamus and pituitary gland
49. Small tubes located at the upper ends of the uterine horns. connects uterine horn to infundibulum. passageway of the egg.
Dairy Cattle Lactation (standard)
oviducts
age and castration
Grading choice
50. 19-23 (21) days
Culls bulls earlier (2 reasons)
sow estrus cycle
Dairy Cattle Lactation (standard)
effects of estrogen